Electric heating-cord machine



M BRlDEZ, JR

ELECTRIC HEATING CORD MACHINE Filed April Juiy -22 1924. 1,502,043

- C. L. M BRIDE, JR

ELECTRIC HEATING CORD MACHINE Filed April 25, 1921 2 Sheets-SheeL 2 Patented July 22, 1924 UNITED STATES LSdZMBE CHK'RLES L. MCBRIDE, JR., 013 TOLEDO, OHIO, ASS-IGNOR TO THE C. L. MCBRIDE MANU FACTURING COMPANY, OF TOLEDO,-OHIO', A CORPORATION OF OHIO. I

ELEOTRIC" HEATING-CORD MACHINE.

Application filed April 25, 1921. Serial No. 464,416.

To all whom it may concern:

Be it known that I, CHARLns L. MCBRIDE, Jr., a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and use ful Improvements in Electric Heating-Cord Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings and to the letters and figures of reference marked thereon, which form a part of this specification.

In certain electrically heated devices in which a coiled resistance wire is employed as the heating element, it is necessary that the wire be evenly and uniformly wound so that the spirals of the coiled wire shall not touch each other and so; that short circuits shall be avoided. It is also necessary that in such heating devices,-as, for instance, in glove stretchers such as are employed in glove factories,the heating element be in.

sulated and protected by a flexible, nonconducting, non-combustible wrapping of asbestos. The object of the present invention is to provide a machine which will rapidly and cheaply produce the sort of heating device here indicated, and, more particu larly, which will, at one operation, produce a smooth uniform cord consisting of a core of asbestos yarn, a resistance wire closely and uniformly wound upon the core in such manner that the spirals shall be regularly and uniformly separated, and outer, windings of asbestos yarn which protect and guard the wire against accidental contact with other objects.

While the broad inventive idea disclosed in this specification may find expression in a variety of forms, I have, for illustration, described herein a machine which is found in practice to satisfactorily accomplish the objects above indicated, such machine being illustrated in the accompanying drawings,

in Which,

Figure 1, is a side-elevation of my machine; F ig..2, a top-plan view of the same with a portion of certain spools hereinafter referred to, broken away; Fig. 3, a frontelevation of the spoolcarrying disc hereinafter referred to; Fig. 4, an elevation of'the opposite side ofthe disc; Fig. 5, a diametrical sectional elevation of .a portion of said disc, on an enlarged scale, showing my fin-- ished cord and the method of assembling its several strands; Fig. 6, an end-view, taken on line aa, on an enlarged scale, of one of the bearingmembers illustrated in Fig. 6, a portion being broken away to show one of the tensionsprings hereinafter referredto; Fig. 8, a front-elevation of a tension-regulator, and guide hereinafter referred to; Fig. 9, a sideelevation of a portion of the support for said tension-regulator, and Fig. 10, a sectional elevation taken on, line 6+6, Fig. 2. I Like reference characters indicate like parts throughout the drawings.

In the drawings, 1 is a frame consisting of two upright members having journaled at PATsNrorFice.

Fig. 2; Fig. 7 a side-elevation,

their top a driving shaft 2, which is, through suitable connections, as, for instance, by pulley' A, arranged to be driven from any suitable source of power, preferably by an electric motor. The shaft 2 carries a pinion 3, in mesh with a gear wheel 4, journaled in the frame 1, upon a stout shaft 5, which extends through and beyond the frame. This shaft is hollow and at its extended inner end, and at a right angle thereto, or frame 7, at the center of which is an aperture 8, in alinement with the bore 6 of the shaft. 999 are brackets arranged and secured in pairs, at equi-distant inter vals, to the side of the disc nearest the frame 1, and asillustrated in F ig. 3. Between each pair of brackets extends 'a removable pin upon which is rotatably mounted a spool 1O. In the present instance, for illustration,

there are three of these spools, but the number may vary as c-ircumstances'may require. One of these spools is wound with resistance wire a, of the required gauge. The other spools are wound with asbestos yarns, 6 and c, of suitable weight. It is to be noted that the larger spools Z), 0, have, in their rotation, a greater momentum than the smaller spool a, for the reason that the more remote portions of thelonger spools have greater lineal speed. The spool disshown as carrying the heavier materialiwire, while the spools b, c, carry thelighter material-yarn. Per lineal foot, the wire is slightly heavier, and the fact that the average effectivemomentum of the spool'a is somewhat lessper unit of mass than the average effective momentum of the respective yarn spools,.is of advantage in approaching a rotativebalance for the apwhich lead the wire and the yarns from the adjacent spools. The wire and the yarns also lead through suitable tension devices.

12, secured to the face of the disc 7 opposite from the spools. (See Fig. 5.)

A gear wheel 13, is journaled between the members of the frame 1 and is in mesh with the gear 4. The shaft 1 1 of the gear 13, by means of a worm gear 15, drives a wormwheel 16, the shaft of which, 17, is mounted in journal-boxes 18, mounted on the frame 19. 20 is a short shaft journaled directly above the shaft 17 in boxes 21. The shafts 17 and 20 carry sleeves 20 on which are pinions 22, in engagement with each other, and which cause the sleeves to revolve in opposite directions. The sleeves 2O have coincident grooves 23, forming between the sleeves an opening .24; in alinement with the boreof the shaft 5. The boxes 21 in which the shaft 20 is journaled, have slight vertical play which may be adjusted by means of the tension-springs 21 and the bolts 21*, (see Fig. 7,) so that the proximity of the sleeves or rollers may be governed, and so that the friction and pull upon'a cord passing between the sleeves or rollers in the opening,

24L may be accurately governed. 25 is a guide-tube the bore of which is in alinement with the bore of the shaft 5, and which is secured to a cross-bar 26 attached to the journal-boxes 18 intermediate the disc 7 and the rollers 20 27 is a spool loosely mounted between brackets or standards 28. This spool is designed to be wound with yarn (Z which feeds directly through tension-device 29,- clearly illustrat d in Fig. 8,mounted on bracket 80, secured to one of the members of the frame 1. The tension-device 29 is in alinement with the bore 6 through the shaft 5, and with the central aperture through the disc 7, as well as the guidetube 25 and the opening 24 between the feed-rolls 21.

The operation of my device is as follows: Assume that the spools 10 and 27 are supplied with wire and yarns as above indicated; that the strand d is threaded through the tension device 29 and through the bore of the shaft 5 and on through the disc, the guide tube and the feed-rolls; that the wire a; and the yarns F9 and c are threaded through their respective apertures 11. in the disc 7 and through their respective tension devices 12 and are wound around the yarn d,the wire being led to the yarn (Z close to the disc,as in Fig. 5. Now, the several associated gears being in motion, the strand cl,'which may be regarded as the core of thecord to be formed,will be drawn from its spool by the feed-rolls 20 At the same time the disc 7 will revolve, causing the wire a and the strands bc,

which are pulled from their spools by the forward movement of the central strand (Z -to wind spirally about the strand d. It will be seen that the wire a, being nearest to the disc, is first wound about the central strand; that the strand 6 is next applied, covering the core and the wire, and that, finally, the strand 0 is applied as an outer wrapping. The cord thus constructed is compressed and compacted and finished as it passes through the feed-rolls from whence it is taken up, spooled or reeled, as may be desired, ready for use.

Having described my invention, what 1 claim and desire to secure by Letters Patent of the United States, is-,

1. In a machine of the described character, a rotary member having therethrough a central opening, means for drawing a strand of yarn as a core through said central opening, a retarding device opposing the drawing means for holding the core therebetween taut, a series of spools carried by said rotary member, devices for guiding other strands from said spools to spaced intervals along said core mechanism for pulling the strands taut independently of disturbing the straight line of the taut core, and devices for actuating said rotary member and said feeding means in harmony, whereby the strands from the spools are wound about said core.

2. A structure as specified in claim 1, in combination with adjusting means for the mechanism spaced from the spools for governing the tension upon said several strands.

3. In a device of the described character, a hollow shaft, a disc carried by the shaft and having a central opening in alinement L with the bore of the shaft, tensioned feedrolls,the opening therebetween being in operative relation to such bore,-a spool arranged to deliver a strand of yarn as a core through said bore and between said feed-rolls,a series of spools carried by the disc, devices including tension applying mechanism for leading yarns from said series of spools radially inwardly to spaced points intermediate said feed-rolls and said disc beyond the end of said hollow shaft, and gears arranged to actuate said disc and said feed rolls in harmony.

4:. In a device of the described character,

a rotary member having an aperture central ly therethrough, a spool carrying a strand, of yarn, a tension applying device spaced from the spool for retarding the feeding of such strand of yarn through said aperture as a core, a plurality of spools mounted upon said rotary member, one of said spools being wound with wire, one or more of the other spools being wound with yarn, tension devices spaced from the spools for re tarding the windings from said spools to said core, the wire being led in advance of the yarn, means for revolving the rotary member, feeding means acting against the tension devices, and means for acuating the feeding devices, the arrangement being such that the movement of said core unwinds the wire and strands from said spools.

5. In a device of the described character, a disc having therethrough a central aperture, brackets in pairs secured upon the side of the disc, spools mounted between said brackets, tension devices spaced from the spools and adapted to guide yarns from the spools radially inwardly, and means for simultaneously feeding a strand of yarn through said aperture and for rotating said disc.

6. In the manufacture of cord, a core supply, feeding rolls, a tension device for the core between the rolls and supply, and movable strand applying means for a plurality of separate plies on said core between the tension device and feeding rolls, embodying a plurality of supply strand supplying spools, a tension device for each strand spaced from its spool, and guide means for directing the supply strands to the tension reach of the core between the core tension device and the feeding rolls for paying out a first strand on said core and successive strands thereover.

7. In the manufacture of cord, a core supply, feeding rolls, a tension device between the rolls and supply, and movable strand applying means for said core between the tension device and feeding rolls,

embodying a rotary mounting member, a plurality of spools for dissimilar weight material, said member supporting a greater weight material spool to have its average effective momentum per unit of mass less than the average effective momentum per conductor core taut, progressing said core, and wrapping thereonto during said progress of the core, a helix of conductor wire to embed in spaced pitches in said core.

9. The method of producing an insulated heating helix embodying drawing a nonconductor core taut, progressing said core, wrapping thereonto during said progress of the core, a helix of conductor wire to embed in spacedpitches in said core, and simultaneously wrapping insulating strands on said core supported helix.

10. The method of producing an insulated heating cord embodying drawing a non-conductor core taut, progressing said core at a uniform rate, and simultaneously wrapping therewith in helical form a conductor wire of less diameter than its pitch, following by an insulating strand of diameter approxlmating its pitch.

11. The method of producing an insulated heating cord embodying drawing a non-conductor core taut, progressing said core at a uniform rate and simultaneously applying in succession along said core at similar pitches a strand of less diameter than its pitch as a conductor, and a plurality of strands ofdiameter approximating said pitchas coating insulation for the core carried conductor. i

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES L. MoBRIDE, JR.

Witnesses:

O. O. ROLIPH, JENNm FLY.

heating helix embodying drawing a non- 

